Summary

This PR adds the /posts/new page with a form to create a new post. The form submits to the backend API and handles both successful and failed submissions.

Features

• Form for Title and Description
• POST request to API endpoint (/posts)
• Redirects to /posts/[slug] if successful
• Displays validation errors if title or description is empty

Notes

• Backend expects "Title" not to be blank and "Description" to be meaningful
• Slug is generated from the title on the backend